20535230143 has 4 divisors (see below), whose sum is σ = 20537777520. Its totient is φ = 20532682768.

The previous prime is 20535230117. The next prime is 20535230203. The reversal of 20535230143 is 34103253502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34103253502 = 2 ⋅17051626751.

It is a cyclic number.

It is not a de Polignac number, because 20535230143 - 2²⁹ = 19998359231 is a prime.

It is a super-3 number, since 3×20535230143³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535230743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1261558 + ... + 1277731.

It is an arithmetic number, because the mean of its divisors is an integer number (5134444380).

Almost surely, 2^20535230143 is an apocalyptic number.

20535230143 is a deficient number, since it is larger than the sum of its proper divisors (2547377).

20535230143 is an equidigital number, since it uses as much as digits as its factorization.

20535230143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547376.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 20535230143 its reverse (34103253502), we get a palindrome (54638483645).

The spelling of 20535230143 in words is "twenty billion, five hundred thirty-five million, two hundred thirty thousand, one hundred forty-three".